package utils;

import com.alibaba.druid.pool.DruidDataSourceFactory;

import javax.sql.DataSource;
import java.io.IOException;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.Properties;

public class JDBCUtils {
    private static DataSource ds;
    static {
        Properties pro = new Properties();
        try {
            pro.load(JDBCUtils.class.getClassLoader().getResourceAsStream("druid.properties"));
            //加载配置文件
            ds = DruidDataSourceFactory.createDataSource(pro);
            //获取DataSource
        } catch (IOException e) {
            e.printStackTrace();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public static Connection getConnection() throws SQLException {
        return ds.getConnection();
    }
    //释放资源
    public static void close(Statement stmt, Connection conn)
    {
        close(null,stmt,conn);
        /*if(stmt!=null)
        {
            try {
                stmt.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
        if(conn!=null)
        {
            try {
                conn.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }*/
    }

    public static void close(ResultSet rs, Statement stmt, Connection conn){
        if( stmt != null){
            try {
                stmt.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }

        if( conn != null){
            try {
                conn.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }

        if(rs!=null)
        { try {
            rs.close();
        } catch (SQLException e) {
            e.printStackTrace();
        }
        }
    }
    /**
     * 获取连接池方法
     */

    public static DataSource getDataSource(){
        return  ds;
    }
}
